Suppress "@-moz-document" warning

[pheuter]

Any way to suppress particular warnings like the one below without changing the log level?

warning: "@-moz-document" is not a known rule name
    78 │ @-moz-document url-prefix() {
       ╵ ~~~~~~~~~~~~~~

[evanw]

Huh. According to MDN this feature was removed from the web because it's actively harmful. But there's an edge case that allows the exact tokens @-moz-document url-prefix() to mean "if Firefox." TIL. I can add support for recognizing @-moz-document.